Well for starters 5% is 5% yes, but you're not accounting that said 5% is going to have most of that 5% in the NA datacenters. While their are some in EU and most likely a handful in JPN. I don't have a number of NA accounts to compare that 1.1 million to but I can tell you sure that it's a significantly higher percentage than 5% when compared to the NA account population.
We've all had bad experiences and I know you can't tell you've had no bad experiences in a game this big. Due to all the bad experiences I've dealt with over the years I've become relatively recluse in-game much like I am irl.
Next is the people with disabilities. As someone who is mentally handicapped themselves, I have 0 issues with disabled individuals needing to take things a bit slower-paced. In fact, I've played with an old friend who lost part of one arm in the conflicts in the middle-east. I say old friend since he passed 3 years ago from mental health issues. Let me tell you this though: it took him a few extra minutes to get situated, but once he got comfortable you wouldn't have been able to tell he was only playing with one hand. The only give away I could possibly notice was small delays in repositioning his character.
Being story focused isn't an excuse to cop a nasty attitude to people that genuinely try to help you improve. That's the other big thing and this is what separates those that want to improve and those that just don't care. It's easy to try to be cordial, but if someone decides to take everything as an attack... I think it's clear who's in the wrong.